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Finding the Fourth Proportional to 19,980.72, 29,972.28 and 7,504.08

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Solution

The fourth proportional to 19,980.72, 29,972.28 and 7,504.08 is: 11,256.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.72 : 29,972.28 = 7,504.08 : x
  2. Step 2: Convert to fraction form
    19,980.72/29,972.28 = 7,504.08/x
  3. Step 3: Cross multiply
    19,980.72x = 29,972.28 × 7,504.08
  4. Step 4: Simplify right side
    19,980.72x = 224,914,386.90
  5. Step 5: Solve for x
    x = 224,914,386.90/19,980.72
  6. Step 6: Final answer
    x = 11,256.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.